Method for transmitting and receiving SRS, and communication apparatus therefor

Abstract

A method for transmitting a sounding reference signal (SRS) by a terminal comprises the steps of: receiving, from a base station, the number of SRS repetition symbols, group hopping patterns, sequence hopping patterns, pattern selection information, and hopping selection information; generating an SRS sequence by applying a group hopping pattern and a sequence hopping pattern selected according to the pattern selection information and the hopping selection information; and transmitting the SRS on the basis of the SRS sequence, wherein the group hopping patterns include a group hopping pattern calculated using the number of SRS repetition symbols, the sequence hopping patterns include a sequence hopping pattern calculated using the number of SRS repetition symbols, and the hopping selection information selects whether to activate group hopping and sequence hopping.

The invention claimed is: 
     
       1. A method of transmitting a sounding reference signal (SRS) by a user equipment (UE), the method comprising:
 receiving a number of SRS repetition symbols, group hopping patterns, sequence hopping patterns, pattern selection information, and hopping selection information from a base station (BS); 
 generating an SRS sequence by applying a first group hopping pattern and a first sequence hopping pattern selected according to the pattern selection information and the hopping selection information; and 
 transmitting the SRS based on the generated SRS sequence, 
 wherein the group hopping patterns include the first group hopping pattern calculated based on the number of SRS repetition symbols, 
 the sequence hopping patterns include the first sequence hopping pattern calculated based on the number of SRS repetition symbols, and 
 selecting enabling or disabling of group hopping and sequence hopping is based on the hopping selection information. 
 
     
     
       2. The method of  claim 1 , wherein the UE selects enabling of only one of group hopping and sequence hopping based on the hopping selection information. 
     
     
       3. The method of  claim 1 , wherein based on the first group hopping pattern, calculated using the number of SRS repetition symbols, being selected according to the pattern selection information, a same SRS sequence is applied to the SRS repetition symbols. 
     
     
       4. The method of  claim 1 , wherein based on the first sequence hopping pattern, calculated using the number of SRS repetition symbols, being selected according to the pattern selection information, a same SRS sequence is applied to the SRS repetition symbols. 
     
     
       5. The method of  claim 1 , wherein based on the first group hopping pattern, calculated using the number of SRS repetition symbols, and the first sequence hopping pattern, calculated using the number of SRS repetition symbols, not being selected according to the pattern selection information, different SRS sequences are applied to the SRS repetition symbols. 
     
     
       6. A method of receiving a sounding reference signal (SRS) by a base station (BS), the method comprising:
 transmitting a number of SRS repetition symbols, group hopping patterns, sequence hopping patterns, pattern selection information, and hopping selection information to a user equipment (UE); and 
 receiving the SRS based on an SRS sequence generated by applying a first group hopping pattern and a first sequence hopping pattern selected according to the pattern selection information and the hopping selection information, 
 wherein the group hopping patterns include the first group hopping pattern calculated based on the number of SRS repetition symbols, 
 the sequence hopping patterns include the first sequence hopping pattern calculated based on the number of SRS repetition symbols, and 
 selecting enabling or disabling of group hopping and sequence hopping is based on the hopping selection information. 
 
     
     
       7. The method of  claim 6 , wherein selecting enabling of only one of group hopping and sequence hopping is based on the hopping selection information. 
     
     
       8. The method of  claim 6 , The method of  claim 6 , wherein based on the first group hopping pattern, calculated using the number of SRS repetition symbols, being selected according to the pattern selection information, a same SRS sequence is applied to the SRS repetition symbols. 
     
     
       9. The method of  claim 6 , wherein based on the first sequence hopping pattern, calculated using the number of SRS repetition symbols, being selected according to the pattern selection information, a same SRS sequence is applied to the SRS repetition symbols. 
     
     
       10. The method of  claim 6 , wherein based on the first group hopping pattern, calculated using the number of SRS repetition symbols, and the first sequence hopping pattern, calculated using the number of SRS repetition symbols, not being selected according to the pattern selection information, different SRS sequences are applied to the SRS repetition symbols. 
     
     
       11. A user equipment (UE) for transmitting a sounding reference signal (SRS), the UE comprising:
 a processor; and 
 a transmitter and receiver coupled to the processor to transmit or receive a radio signal, 
 wherein the processor: 
 receives a number of SRS repetition symbols, group hopping patterns, sequence hopping patterns, pattern selection information, and hopping selection information from a base station (BS) through the receiver, generates an SRS sequence by applying a first group hopping pattern and a first sequence hopping pattern selected according to the pattern selection information and the hopping selection information, and transmits the SRS based on the generated SRS sequence, 
 the group hopping patterns include the first group hopping pattern calculated based on the number of SRS repetition symbols, 
 the sequence hopping patterns include the first sequence hopping pattern calculated based on the number of SRS repetition symbols, and 
 the processor selects enabling of only one of group hopping and sequence hopping based on the hopping selection information. 
 
     
     
       12. The UE of  claim 11 , wherein based on the first group hopping pattern, calculated using the number of SRS repetition symbols, being selected according to the pattern selection information, a same SRS sequence is applied to the SRS repetition symbols. 
     
     
       13. The UE of  claim 11 , wherein based on the first sequence hopping pattern, calculated using the number of SRS repetition symbols, being selected according to the pattern selection information, a and the same SRS sequence is applied to the SRS repetition symbols. 
     
     
       14. A base station (BS) for receiving a sounding reference signal (SRS), the BS comprising:
 a processor; and 
 a transmitter and receiver coupled to the processor to transmit or receive a radio signal, 
 wherein the processor: 
 transmits a number of SRS repetition symbols, group hopping patterns, sequence hopping patterns, pattern selection information, and hopping selection information through the transmitter to a user equipment (UE), and receives the SRS based on an SRS sequence generated by applying a first group hopping pattern and a first sequence hopping pattern selected according to the pattern selection information and the hopping selection information from the UE, 
 the group hopping patterns include the first group hopping pattern calculated based on the number of SRS repetition symbols, 
 the sequence hopping patterns include the first sequence hopping pattern calculated based on the number of SRS repetition symbols, and 
 selecting enabling of only one of group hopping and sequence hopping is based on the hopping selection information. 
 
     
     
       15. The BS of  claim 14 , wherein selecting application of only one of the first group hopping pattern, calculated using the number of SRS repetition symbols, and the first sequence hopping pattern, calculated using the number of SRS repetition symbols, is based on the pattern selection information.